Fluid-lift pump



Feb.

H. H GRACEY FLUID LIFT PUMP Filed Oct. 21,

Patented Feb. 119, i924.

HARVEY E. GRACEY, 0F FORT WORTH, TEXAS.

FLUID-LIFT PUMP.

Application filed October 21, 1922. Serial no. seaoee.

To all whom it may concem:

Be it known that I, HARVEY H. GRACEY, a

citizen of the United States, residing at' which have very few parts and which have no leather or rubber elements to be worn out and which have no movable parts and by which all the pneumatic power supplied will be utilized in lifting the liquid out of intact at the bottom of the well.

wells and which have been demonstrated to be highly efiicient in pumping generally and in clearing oil wells of salt water mixed with the oil. Another advantage is that the pumps maintain suflicient liquid on the sand or on top of the sand to preserve the sand Other objects and advantages willv be fully explained in the following description, and the invention will be more particularly pointed out in the claims.

Reference is had to the accompanying drawing which forms a part of this application.

The figure of-drawing is a vertical section of the improved pumping apparatus.

In the drawing a well casing l is shown with the lower end provided with perforations 12 to permit the intake of oil or other liquids. An air or pneumatic chamber 2 is mounted within the casing 1. The'chamber 2 has a thick integral steel cap 14 and a horizontal partition 9 in the lower part thereof. A relatively large discharge tube 4 is projected through the steel cap 14-. and welded thereto and constitutes a part of the discharge pipe. The"dis charge pipe 3 is screwed into the upper end of the-pipe l for completing the discharge passage. A nipple 6 is welded to the partition 9 and forms the escape for the liquid upwardly. The discharge pipe or tube 1 surrounds the upper end. of the ni ple 6 and forms an an nular receiving nozz e for air or other pneumatic element between the interior surface of the pipe 4 and the outer periphery of the nipple 6. A continuous annular lift is thus provided for stream of liquid which is passing up through the nipple 6.

down into the sand screen.

Various changes in the s1zes,'oroport1ons,-

.jecting through said cap and welded thereengaging the cylindrical The liquid is thus lifted uniformly around the entire stream of liquid. Air or another pneumatic element is forced down into the chamberv 4 by means of a pipe 10 which is coupled to a nipple 5 which is welded in the cap 14 and projects therethrough. The part 8 of the chamber 1 which projects below the partition 9 is perforated. and forms a sand screen and the chamber is closed at the bottom, so that any liquid that passes into the sand screen must pass through perforations 11 in the side of the chamber. Air or another pneumatic element is let down into the sand screen chamber 8 bya pipe 7 which is welded to the partition 9. The pipe, 7 has an upturned nozzle 13 for stirring or agitating the sand should the sand tend to accumulate in' the sand screen. With such construction, there is no disturbing of the sand in the lower part of the casing 1 and on the outside of the casing. The pipe.13 will also aid in starting liquid through the nipple 6 because the air will tend to lift the liquid up to the nipple 6 which projects construction and arrangement of the several parts may be made without departing from my invention.

WhatI claim is:

1. In a wellcasing, a pneumatic pumping apparatus comprising an air chamber provided with an integral cap. a starting pipe suspended in said chamber and proto, a discharge pipe connected to said start ing pipe, said chamber being extended downwardly to form a sand screen, a perforated partition dividing said sand screen from said air chamber, a nipple projecting through said partition into said sand screen chamber and centrally into said starting pipe and spaced therefrom, atube projected through said partition and down into said sand screen for agitating the sand w1th compressed air and means for admitting compressed air into said air chamber.

2. In a well casing, a chamber vertically disposed in said casin and provided w1th a horizontal partition ividing said chamber into a pneumatic chamber and a sand screen below the partition, a cylindrical startm pipe projecting through the upper end 0 said pneumatic chamber and rigld therewith and suspended therein, a dischargepipe connected to said starting pipe, a cylindrical nipple projecting through said partition downwardly into said sand screen and. upwardly and centrally in said starting pipe 1 and forming therewith a circular receiving nozzle, means for agitating the sand in said sand screen and means for a'dmittin compressed air into said pneumatic cham er.

3. In a well casing, a chamber vertically disposed in said casing and provided with a horizontal partition divriding said chamber into a pneumatic chamber and a sand screen below the partition, a, cylindrical starting pipe projecting through the upper end of sald pneumatic chamber and rigid therewith and suspended therein, a discharge pipe connected to said starting pipe, a cylindrical nipple r ojetting through said partition downwar 1y into said sand screen and upwardly and centrally in said starting pipe and forming therewith a circular rece1ving nozzle, means for admitting com- 'pressed air into said pneumatic chamber, ,said sand screen havin side wall and having t e lower end closed, and a tube communicating with said pneu- ,1natic chamber and projecting down into said sand screen and provided with a sand agitating nozzle.

In testimony whereof, I set my hand, this 1st day of September, 1922. p

, HARVEY H. (J'rRACEY.

perforations in the 

